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Publication numberUS4357724 A
Publication typeGrant
Application numberUS 06/172,004
Publication dateNov 9, 1982
Filing dateJul 24, 1980
Priority dateJul 24, 1980
Also published asCA1143075A1
Publication number06172004, 172004, US 4357724 A, US 4357724A, US-A-4357724, US4357724 A, US4357724A
InventorsGuy Laforest
Original AssigneeGuy Laforest
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pneumatic core for adjustable firmness of mattresses, cushions and the like
US 4357724 A
Abstract
A pneumatic core for mattresses, cushions, car seats and the like, is disclosed. The core comprises an upper sheet of rubberized cloth and a lower sheet of flexible rubber material forming a plurality of protrusions when inflated.
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Claims(2)
What I claim is:
1. In a combination with a mattress, cushion, car seats and the like articles, having an inner coil spring structure, a pneumatic core overlying said structure and comprising an upper sheet of rubberized, non-elastic cloth and a lower sheet of flexible, elastic rubber forming a plurality of protrusions inserted in the openings of the coil springs of said inner coil spring structure.
2. The combination as defined in claim 1, further including a padding overlying and glued to the upper sheet of rubberized cloth and a cover placed over the overall padding, core and inner coil spring structure.
Description

This invention relates to mattresses, chesterfield cushions, car seats and the like, and more particularly to means for adjusting the degree of firmness of mattresses, cushions, car seats and the like.

Mattresses, cushions, car seats and the like are generally supplied in different degree of firmness, and it is generally impossible to change such degree of firmness of the article once it has been built.

It has been proposed in U.S. Pat. No. 2,000,873 to insert a pneumatic core into a mattress to modify the cushioning properties of the mattress. However, such pneumatic core lacks stability and, in addition, is not well suited to inner spring mattresses, cushions and the like.

It is therefore the object of the present invention to provide a pneumatic core for use with mattresses, cushions and the like of all types, including those having an inner coil spring structure, which permits adjustment of the firmness while maintaining the lateral stability of the article and avoiding uneven firmness on the top of the article.

The pneumatic core in accordance with the invention comprises an upper sheet of rubberized, non-elastic cloth and a lower sheet of flexible and elastic rubber material having a plurality of protrusions adapted to be inserted in at least some of the openings of the coil springs of the inner spring structure, or adapted to extend within the compressible material of either types of mattresses or the like.

A padding is preferably glued to the upper sheet of the core and the padding, pneumatic core and inner coil spring structure, if any, placed inside a suitable cover.

The invention will now be disclosed, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a side view, partly shown in the section of a mattress, incorporating a pneumatic core in accordance with the invention;

FIG. 2 illustrates a top view, partly in section, of the mattress shown in FIG. 1; and

FIG. 3 shows an enlarged view of a portion of the mattress shown in FIG. 1.

Referring to the drawings, there is shown an inner coil spring mattress having a rectangular wooden box frame 10, upon which are secured a plurality of coil springs 12 in known manner. The mattress is divided in two longitudinal spring sections for the comfort of two persons sleeping in the same bed. A separate pneumatic core is placed over each individual spring section. Each pneumatic core comprises an upper sheet 14, made of a rubberized, non-elastic cloth, and a lower sheet 16, made of flexible, elastic rubber material having a plurality of protrusions therein adapted to be inserted in at least some of the openings in the coil springs 12 to ensure lateral stability of the mattress. A padding 18, of suitable material, such as foam, is glued, or otherwise secured, to the upper sheet of the pneumatic core and its marginal portion 19 surrounds the pneumatic core and is secured to frame 10 to further ensure lateral stability of the mattress. An overall cover 20 is placed over the padding, core and mattress structure.

The main advantage of the pneumatic core in accordance with the invention is that the protrusions in the core provide a great amount of stability of the mattress, while permitting to adjust the degree of firmness by inflating the pneumatic core to a suitable pressure by means of valves 22 and avoiding uneven firmness at the top surface of the mattress, or the like, since the upper sheet 14 remains substantially flat when the core is inflated.

In the preferred embodiment shown in the drawings, each section of the mattress may be inflated to a pressure providing the most comfortable sleeping position to the person sleeping on that portion of the mattress.

Although the invention has been disclosed with reference to a mattress having two separate pneumatic cores, it is to be understood that a single pneumatic core could be used.

It is also to be understood that the present invention is not limited to mattresses, but that the pneumatic core could be used for chesterfield cushions, car seats and other devices having, or not, an inner coil spring structure.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1928675 *Sep 25, 1931Oct 3, 1933Robert W SampsonPneumatic cushion
US2521530 *Jul 29, 1948Sep 5, 1950Lois B McguffageAdjustable pillow block
US2691179 *May 25, 1951Oct 12, 1954Englander Co IncPneumatic structure for mattresses, seat and back cushions, and the like
US2748399 *May 25, 1950Jun 5, 1956Dayton Rubber CompanyLight-weight foam rubber cushioning structure
US2814053 *Sep 2, 1954Nov 26, 1957Burton Dixie CorpInflatable mattress
US3045257 *Jan 12, 1959Jul 24, 1962Knapp Monarch CoFolding cot
US3110520 *Sep 11, 1961Nov 12, 1963Herding AlfredAir-cushioned upholstery, particularly for the seat member of motor vehicles or the like
US3736027 *Feb 7, 1972May 29, 1973A P StaffordAir seat
US4076872 *Mar 16, 1977Feb 28, 1978Stephen LewickiInflatable cellular assemblies of plastic material
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4788731 *Mar 2, 1987Dec 6, 1988Aisin Seiki Kabushiki KaishaMattress
US5113539 *Jul 31, 1991May 19, 1992Strell Brian MAdjustable firmness coil spring mattress with inflatable tubes
US5116045 *Apr 14, 1989May 26, 1992Frantisek JahodaSports mat, notably a movable judo mat
US5332202 *Feb 6, 1991Jul 26, 1994The Ohio Mattress Company Licensing And Components GroupPneumatic member and related attachment elements for cushions, seats, foundations and the like
US5414874 *Mar 30, 1994May 16, 1995The Ohio Mattress Company Licensing & Components GroupAttachment member for spring or spring-like element
US5435023 *Mar 30, 1994Jul 25, 1995The Ohio Mattress Company Licensing And Components GroupWire grid attachment member for cushions, seats, foundations and the like
US5469590 *Mar 4, 1994Nov 28, 1995The Spring Air CompanyMattress with compressible support members
US5713817 *Feb 22, 1994Feb 3, 1998Buchanan; David D.Shock displacing inflatable bag
US6098223 *May 7, 1998Aug 8, 2000Larson; Lynn D.Inner spring mattress with firmness adjusting air bladders
US6317912 *Mar 8, 2000Nov 20, 2001Kurtis F. GraebeBed mattress with air cells and spring pockets
US7188379 *Feb 15, 2005Mar 13, 2007L & P Property Management CompanyCombination air and spring mattress for a sofa sleeper
WO2001065978A2 *Mar 8, 2001Sep 13, 2001Kurtis F GraebeBed mattress with air cells and spring pockets
Classifications
U.S. Classification5/706, 5/655.3, 297/DIG.3, 5/716
International ClassificationA47C23/047, A47C23/30, A47C27/08
Cooperative ClassificationY10S297/03, A47C27/18, A47C27/061, A47C23/30, A47C27/081, A47C23/047
European ClassificationA47C23/047, A47C27/18, A47C27/06A, A47C27/08A, A47C23/30
Legal Events
DateCodeEventDescription
Aug 3, 2004ASAssignment
Owner name: INTERNATIONAL BUSINESS MACHINES CORPORATION, NEW Y
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RHOADES, DAVID B.;REEL/FRAME:015040/0972
Effective date: 20040617
Owner name: INTERNATIONAL BUSINESS MACHINES CORPORATION NEW OR
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RHOADES, DAVID B. /AR;REEL/FRAME:015040/0972